12204433440221 has 4 divisors (see below), whose sum is σ = 13313927389344. Its totient is φ = 11094939491100.

The previous prime is 12204433440181. The next prime is 12204433440271.

It is a happy number.

12204433440221 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12204433440221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12204433440271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554746974545 + ... + 554746974566.

It is an arithmetic number, because the mean of its divisors is an integer number (3328481847336).

Almost surely, 2^{12204433440221} is an apocalyptic number.

12204433440221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12204433440221 is a deficient number, since it is larger than the sum of its proper divisors (1109493949123).

12204433440221 is a wasteful number, since it uses less digits than its factorization.

12204433440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109493949122.

The product of its (nonzero) digits is 36864, while the sum is 32.

It can be divided in two parts, 1220443 and 3440221, that added together give a palindrome (4660664).

The spelling of 12204433440221 in words is "twelve trillion, two hundred four billion, four hundred thirty-three million, four hundred forty thousand, two hundred twenty-one".